From: Wenjing Liu <[email protected]> [ Upstream commit 99b922f9ed6a6313c0d2247cde8aa1e4a0bd67e4 ]
[why] Some dongle doesn't have a valid extended dongle caps, but we still set the extended dongle caps to be valid. This causes validation fails for all timing. [how] If no dp_hdmi_max_pixel_clk is provided, don't use extended dongle caps. Signed-off-by: Wenjing Liu <[email protected]> Reviewed-by: Aric Cyr <[email protected]> Reviewed-by: Jun Lei <[email protected]> Acked-by: Abdoulaye Berthe <[email protected]> Acked-by: Leo Li <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index d91df5ef0cb3..d33a5ebe990b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2240,7 +2240,8 @@ static void get_active_converter_info( translate_dpcd_max_bpc( hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT); - link->dpcd_caps.dongle_caps.extendedCapValid = true; + if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk != 0) + link->dpcd_caps.dongle_caps.extendedCapValid = true; } break; -- 2.19.1
